转EventUtil

var EventUtil = new Object; /**//* 此方法用来给特定对象添加事件，oTarget是指定对象,sEventType是事件类型，如click、keydown等， fnHandler是事件回调函数 /**/ EventUtil.addEventHandler = function (oTarget, sEventType, fnHandler) { //firefox情况下 if (oTarget.addEventListener) { oTarget.addEventListener(sEventType, fnHandler, false); } //IE下 else if (oTarget.attachEvent) { oTarget.attachEvent("on" + sEventType, fnHandler); } else { oTarget["on" + sEventType] = fnHandler; } }; /* 此方法用来移除特定对象的特定事件，oTarget是指定对象,sEventType是事件类型，如click、keydown等，fnHandler是事件回调函数 /* */ EventUtil.removeEventHandler = function (oTarget, sEventType, fnHandler) { if (oTarget.removeEventListener) { oTarget.removeEventListener(sEventType, fnHandler, false); } else if (oTarget.detachEvent) { oTarget.detachEvent("on" + sEventType, fnHandler); } else { oTarget["on" + sEventType] = null; } }; /* 格式化事件，因为IE和其他浏览器下获取事件的方式不同并且事件的属性也不尽相同，通过此方法提供一个一致的事件 */ EventUtil.formatEvent = function (oEvent) { //isIE和isWin引用到一个js文件，判断浏览器和操作系统类型 if (isIE && isWin) { oEvent.charCode = (oEvent.type == "keypress") ? oEvent.keyCode : 0; //IE只支持冒泡，不支持捕获 oEvent.eventPhase = 2; oEvent.isChar = (oEvent.charCode > 0); oEvent.pageX = oEvent.clientX + document.body.scrollLeft; oEvent.pageY = oEvent.clientY + document.body.scrollTop; //阻止事件的默认行为 oEvent.preventDefault = function () { this.returnValue = false; }; //将toElement,fromElement转化为标准的relatedTarget if (oEvent.type == "mouseout") { oEvent.relatedTarget = oEvent.toElement; } else if (oEvent.type == "mouseover") { oEvent.relatedTarget = oEvent.fromElement; } //取消冒泡 oEvent.stopPropagation = function () { this.cancelBubble = true; }; oEvent.target = oEvent.srcElement; //添加事件发生时间属性，IE没有 oEvent.time = (new Date).getTime(); } return oEvent; }; EventUtil.getEvent = function() { if (window.event) { //格式化IE的事件 return this.formatEvent(window.event); } else { return EventUtil.getEvent.caller.arguments[0]; } };